Ethical Situation

At one of my recent jobs, my employer paid part of my wages under the table.  I was told that they did not want to have to pay taxes on all my wages. They paid my medical insurance but I had to work a certain number of hours that would equal my insurance payment.  I could buy things through the business and that would be deducted from the hours worked.  I received a payroll check, but it was very minimal only $600.00 a month.I was working 40 - 50 hours a week.  At the time I felt I had no choice but to go along with the arrangements.  If I had to do it again I would not have gone to work for this company.